Mount Arlington is a borough in western Morris County, in the U.S. state of New Jersey.Explore Southwestern Morris County, Morris County Tourism Authority. Accessed April 10, 2024. "Southwestern Morris County includes a multitude of farms, farmers markets and community-supported agriculture offering fresh produce and festivals throughout the growing season throughout its communities of Mount Olive, Washington Township (Long Valley), Roxbury, Chester, Chester Township, Mount Arlington, Mendham, Mendham Township, Randolph and Netcong." As of the 2020 United States census, the borough's population was 5,909, an increase of 859 (+17.0%) from the 2010 census count of 5,050, which in turn reflected an increase of 387 (+8.3%) from the 4,663 counted in the 2000 census.Table 7. Population for the Counties and Municipalities in New Jersey: 1990, 2000 and 2010, New Jersey Department of Labor and Workforce Development, February 2011. Accessed May 1, 2023.

The borough is located on the southeast shore of Lake Hopatcong, New Jersey's largest lake and a major recreational resource. Mount Arlington is home to the Lake Hopatcong Yacht Club.

History While Mount Arlington is now mostly a suburban residential community, it was once a resort community. In the era before the world wars and the advent of air travel, it was a respite for the residents of nearby New York City and Newark.

Every summer, thousands would arrive by train at Landing Station, and then travel by water taxi across Lake Hopatcong to the area's many large resort hotels to escape the city heat and enjoy the famous "Mount Arlington breeze" which always cooled the summer evenings. There was also a major amusement park, Bertrand Island, which featured a world-famous carousel and roller coaster, which operated until the park was closed in 1983.Hughes, Jennifer V. "Catch a Train, but Look at the Prancing Horses", The New York Times, November 25, 2007. Accessed December 20, 2012. "The murals are an homage to the Bertrand Island Amusement Park, along Lake Hopatcong, which drew visitors to the area from the early 1900s to its closing in 1983."

Mount Arlington was incorporated as a borough by an act of the New Jersey Legislature on November 3, 1890, from portions of Roxbury, based on the results of a referendum held two days earlier. Additional territory was acquired from Roxbury on July 25, 1891, on May 31, 1893, and on May 31, 1894.Snyder, John P. The Story of New Jersey's Civil Boundaries: 1606-1968, Bureau of Geology and Topography; Trenton, New Jersey; 1969. p. 195. Accessed May 30, 2024.Historical Timeline of Morris County Boundaries, Morris County Library. Accessed December 24, 2016. "1890, November 3. Mount Arlington Borough is established from Mount Olive." The borough is named for Henry Bennet, 1st Earl of Arlington.Hutchinson, Viola L. The Origin of New Jersey Place Names, New Jersey Public Library Commission, May 1945. Accessed September 8, 2015.

In March 2014, members of the public petitioned the New Jersey Department of Community Affairs to form the Roxbury Mount Arlington Study Commission to consider a possible consolidation of Mount Arlington and the neighboring municipality of Roxbury. In March 2015, the commission was formed with five members and two alternates from each municipality. If the commission had voted to recommend a merger, the decision would have had to be ratified by a referendum of the voters in each community.Westhoven, William. "Roxbury-Mt. Arlington consolidation commission named", Daily Record, March 30, 2015. "The public is about to get its first chance to meet the chosen members of the Roxbury Mount Arlington Study Commission and discuss the dominant topic on its agenda — a possible consolidation of the neighboring municipalities."

Geography According to the United States Census Bureau, the borough had a total area of 2.79 square miles (7.23 km2), including 2.14 square miles (5.54 km2) of land and 0.65 square miles (1.68 km2) of water (23.30%).

The borough borders the municipalities of Jefferson Township and Roxbury in Morris County; and Hopatcong in Sussex County.Areas touching Mount Arlington, MapIt. Accessed February 28, 2020.Morris County Municipalities Map, Morris County, New Jersey Department of Planning and Preservation. Accessed February 28, 2020.New Jersey Municipal Boundaries, New Jersey Department of Transportation. Accessed November 15, 2019.

Recreation

Mount Arlington is home to the Lake Hopatcong Yacht Club. Established in 1905, it is a private yacht club located on the small peninsula of Bertrand Island along Lake Hopatcong.History, Lake Hopatcong Yacht Club. Accessed May 14, 2023. "The grounds were still being graded as the club house opened on July 9th, 1910." The Adirondack style clubhouse structure was completed in 1910 and was added in 1999 to both the National and New Jersey registers of historic places.New Jersey and National Registers of Historic Places: Morris County, New Jersey Department of Environmental Protection Historic Preservation Office, updated March 30, 2023. Accessed May 15, 2023.

Demographics

2020 census As of the 2020 census, Mount Arlington had a population of 5,909. The median age was 49.2 years. 14.5% of residents were under the age of 18 and 25.6% of residents were 65 years of age or older. For every 100 females there were 86.4 males, and for every 100 females age 18 and over there were 83.0 males age 18 and over.

98.6% of residents lived in urban areas, while 1.4% lived in rural areas.

There were 2,651 households in Mount Arlington, of which 20.7% had children under the age of 18 living in them. Of all households, 45.8% were married-couple households, 14.9% were households with a male householder and no spouse or partner present, and 32.1% were households with a female householder and no spouse or partner present. About 32.5% of all households were made up of individuals and 16.5% had someone living alone who was 65 years of age or older.

There were 2,915 housing units, of which 9.1% were vacant. The homeowner vacancy rate was 1.2% and the rental vacancy rate was 9.3%.

+ Racial composition as of the 2020 census Race Number Percent White 4,649 78.7% Black or African American 205 3.5% American Indian and Alaska Native 10 0.2% Asian 341 5.8% Native Hawaiian and Other Pacific Islander 1 0.0% Some other race 217 3.7% Two or more races 486 8.2% Hispanic or Latino (of any race) 719 12.2%

2010 census The 2010 United States census counted 5,050 people, 2,283 households, and 1,347 families in the borough. The population density was 2,325.2 per square mile (897.8/km2). There were 2,545 housing units at an average density of 1,171.8 per square mile (452.4/km2). The racial makeup was 90.44% (4,567) White, 2.32% (117) Black or African American, 0.18% (9) Native American, 3.58% (181) Asian, 0.04% (2) Pacific Islander, 1.41% (71) from other races, and 2.04% (103) from two or more races. Hispanic or Latino people of any race were 8.22% (415) of the population.

Of the 2,283 households, 21.8% had children under the age of 18; 47.2% were married couples living together; 8.9% had a female householder with no husband present and 41.0% were non-families. Of all households, 34.6% were made up of individuals and 14.9% had someone living alone who was 65 years of age or older. The average household size was 2.21 and the average family size was 2.88.

17.9% of the population were under the age of 18, 5.8% from 18 to 24, 24.7% from 25 to 44, 31.2% from 45 to 64, and 20.4% who were 65 years of age or older. The median age was 45.8 years. For every 100 females, the population had 85.6 males. For every 100 females ages 18 and older there were 80.9 males.

The Census Bureau's 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $77,240 (with a margin of error of +/− $14,564) and the median family income was $93,780 (+/− $8,872). Males had a median income of $61,838 (+/− $16,955) versus $59,950 (+/− $11,428) for females. The per capita income for the borough was $43,226 (+/− $4,107). About none of families and 2.8% of the population were below the poverty line, including 2.9% of those under age 18 and 5.7% of those age 65 or over.DP03: Selected Economic Characteristics from the 2006-2010 American Community Survey 5-Year Estimates for Mount Arlington borough, Morris County, New Jersey , United States Census Bureau. Accessed December 20, 2012.

2000 census As of the 2000 United States census there were 4,663 people, 1,918 households, and 1,262 families residing in the borough. The population density was . There were 2,039 housing units at an average density of . The racial makeup of the borough was 91.42% White, 1.82% African American, 0.19% Native American, 3.82% Asian, 0.04% Pacific Islander, 1.27% from other races, and 1.44% from two or more races. Hispanic or Latino people of any race were 4.55% of the population.Census 2000 Profiles of Demographic / Social / Economic / Housing Characteristics for Mount Arlington borough, New Jersey , United States Census Bureau. Accessed December 20, 2012.DP-1: Profile of General Demographic Characteristics: 2000 - Census 2000 Summary File 1 (SF 1) 100-Percent Data for Mount Arlington borough, Morris County, New Jersey , United States Census Bureau. Accessed December 20, 2012.

There were 1,918 households, out of which 28.3% had children under the age of 18 living with them, 54.5% were married couples living together, 8.7% had a female householder with no husband present, and 34.2% were non-families. 27.9% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.99.

In the borough the population was spread out, with 22.1% under the age of 18, 5.3% from 18 to 24, 35.5% from 25 to 44, 26.5% from 45 to 64, and 10.6% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 90.6 males. For every 100 females age 18 and over, there were 87.1 males.

The median income for a household in the borough was $67,213, and the median income for a family was $79,514. Males had a median income of $53,049 versus $40,417 for females. The per capita income for the borough was $32,222. About 2.3% of families and 3.3% of the population were below the poverty line, including 5.3% of those under age 18 and 3.4% of those age 65 or over. Government Local government